Continuous oil pipe hanger for velocity tubular column

Abstract

The invention relates to a continuous oil pipe hanger for a velocity tubular column. The continuous oil pipe hanger comprises a continuous oil pipe, an I-shaped flange, an upper slip assembly, a lower slip assembly, an upper shell, a middle shell and a lower shell, wherein vertically penetrating central holes are formed in the upper shell, the middle shell and the lower shell; the I-shaped flange is fixedly arranged at the top of the upper shell; the continuous oil pipe passes through the I-shaped flange and the central holes of the upper shell, the middle shell and the lower shell in turn; the upper slip assembly is clamped on an inner wall of the central hole of the upper shell; the lower slip assembly is located in the central hole of the middle shell; a connecting pipe sealing set is fixedly arranged on an inner wall of the central hole of the middle shell and the lower side of a hanging supporting sleeve; at least one pair of driving pistons is arranged on the inner walls of the central holes of the middle shell and the lower shell and under the connecting pipe sealing set; an upper oil port and a lower oil port respectively communicated with the driving pistons are arranged on the side walls of the middle shell and the lower shell. The continuous oil pipe hanger has the beneficial effect of capability of hanging the continuous oil pipe.

Description

technical field [0001] The invention relates to a coiled tubing speed string operation auxiliary equipment, in particular to a speed string coiled tubing hanger. Background technique [0002] In the middle and late stages of production of water-producing gas wells, due to the decrease in production layer pressure and the increase in water volume, the produced water cannot be discharged in time, thereby reducing the production of gas wells, and even causing wells to be crushed to death. Coiled tubing velocity string drainage gas recovery technology is to lower the tubing with smaller diameter under the condition of underbalance in the original well and hang it at the wellhead. Increase, the high-speed gas flow can greatly enhance the carrying capacity of the produced fluid, which can effectively slow down the water breakthrough time of the gas well. This technology has the advantages of short construction time, quick production increase, long production cycle, and avoiding d...

AI Technical Summary

Problems solved by technology

[0004] The coiled tubing speed string hanger cannot seal the bottom hole pressure, and the annulus of the coiled tubing speed string hanger cannot be sealed, leaving hidden dangers for operation safety

[0005] The coiled tubing speed string hanger cannot realize the function of hanging the tubing; the coiled tubing slides upward under the action of the bottom hole pressure, which makes it impossible to implement the coiled tubing operation process and leaves hidden dangers for the safe operation of the wellhead

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